# File lib/phusion_passenger/utils.rb, line 439
        def local_socket_address?(address)
                case get_socket_address_type(address)
                when :unix
                        return true
                when :tcp
                        host, port = address.sub(%r{^tcp://}, '').split(':', 2)
                        return host == "127.0.0.1" || host == "::1" || host == "localhost"
                else
                        raise ArgumentError, "Unknown socket address type for '#{address}'."
                end
        end